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When I check my e-mail on knology I get this message "Remote XUL; This page uses an unsupported technology that is no longer available by default in Firefox. Please contact the website owners to inform them of this problem." What should I do?

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This happens when I try to check my e-mail using firefox. I don't have this problem if I use internet explorer. This is my internet service provider's home site: http://home.knology.net/

This happens when I try to check my e-mail using firefox. I don't have this problem if I use internet explorer. This is my internet service provider's home site: http://home.knology.net/

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Install this extension and set it up to allow that domain.
https://addons.mozilla.org/en-US/firefox/addon/remote-xul-manager/